/* ==========================================================================
   EXECUTIVE DESIGN SYSTEM - STYLE.CSS
   Vivek Krishnakumar Website Revamp
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens & Variables
   -------------------------------------------------------------------------- */
:root[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --text-primary: #f9fafb;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --accent: #38bdf8;
  --accent-secondary: #0d9488;
  --accent-rgb: 56, 189, 248;
  --accent-hover: #0ea5e9;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --card-bg: rgba(17, 24, 39, 0.7);
  --card-shadow: 0 12px 40px -12px rgba(0, 0, 0, 0.5);
  
  --dna-color: rgba(56, 189, 248, 0.12);
  --loader-bg: #090d16;
  --timeline-line: #1f2937;
}

:root[data-theme="light"] {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  --accent: #0284c7;
  --accent-secondary: #0f766e;
  --accent-rgb: 2, 132, 199;
  --accent-hover: #0369a1;
  
  --border-color: rgba(15, 23, 42, 0.08);
  --border-hover: rgba(15, 23, 42, 0.15);
  
  --card-bg: rgba(255, 255, 255, 0.85);
  --card-shadow: 0 12px 40px -12px rgba(15, 23, 42, 0.04);
  
  --dna-color: rgba(2, 132, 199, 0.06);
  --loader-bg: #f8fafc;
  --timeline-line: #e2e8f0;
}

/* --------------------------------------------------------------------------
   2. Reset & Core Base Styles
   -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 62.5%; /* 1rem = 10px */
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.6rem;
  line-height: 1.6;
  color: var(--text-secondary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

iframe {
  border: 0;
}

button {
  cursor: pointer;
  border: none;
  background: transparent;
  font-family: inherit;
}

/* --------------------------------------------------------------------------
   3. Loading Screen
   -------------------------------------------------------------------------- */
.loader-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--loader-bg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader-container.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 20px;
}

.loader-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* --------------------------------------------------------------------------
   4. Canvas & Layout Shell
   -------------------------------------------------------------------------- */
#dna-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background-color 0.4s ease, border-bottom 0.4s ease;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-link {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.logo-title {
  font-size: 1.1rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 2.5rem;
}

.nav-link {
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.8rem 0;
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link.active {
  color: var(--accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent);
  border-radius: 2px;
}

.theme-toggle-btn {
  padding: 0.8rem;
  border-radius: 50%;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, color 0.2s ease;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-color);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Toggle Sun/Moon display */
:root[data-theme="dark"] .sun-icon { display: block; }
:root[data-theme="dark"] .moon-icon { display: none; }
:root[data-theme="light"] .sun-icon { display: none; }
:root[data-theme="light"] .moon-icon { display: block; }

.sun-icon, .moon-icon {
  width: 1.8rem;
  height: 1.8rem;
}

/* Mobile Hamburger Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
  z-index: 1001;
}

.menu-toggle .bar {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* --------------------------------------------------------------------------
   5. Content View Panels
   -------------------------------------------------------------------------- */
.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 120px 3rem 60px;
  position: relative;
  z-index: 1;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view-panel {
  display: none;
  opacity: 0;
  transform: translateY(15px);
}

.view-panel.active-panel {
  display: block;
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Shared Panel Headings */
.panel-header {
  margin-bottom: 4rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
}

.panel-heading {
  font-size: 3.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.panel-subheading {
  font-size: 1.4rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Card base styling */
.card {
  background-color: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: var(--card-shadow);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
  border-color: var(--border-hover);
}

/* Button UI elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem 2.8rem;
  border-radius: 8px;
  font-size: 1.4rem;
  font-weight: 600;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
  background-color: var(--accent);
  color: #ffffff !important;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.3);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary) !important;
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-primary);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

/* --------------------------------------------------------------------------
   6. Panel: Home
   -------------------------------------------------------------------------- */
.home-container {
  display: grid;
  grid-template-columns: 1.1fr 1.8fr;
  gap: 6rem;
  align-items: center;
  min-height: 55vh;
}

.profile-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 4rem 3rem;
  box-shadow: var(--card-shadow);
}

.avatar-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 2.5rem;
}

.avatar-wrapper::after {
  content: '';
  position: absolute;
  top: -6px;
  left: -6px;
  right: -6px;
  bottom: -6px;
  border: 2px dashed var(--accent);
  border-radius: 50%;
  opacity: 0.3;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

#profile-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--bg-secondary);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.profile-card:hover #profile-avatar {
  transform: scale(1.04);
}

.profile-card:hover .avatar-wrapper::after {
  transform: rotate(180deg) scale(1.08);
  opacity: 0.8;
}

.profile-name-text {
  font-size: 2.6rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  letter-spacing: -0.02em;
}

.profile-title-text {
  font-size: 1.4rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3rem;
  font-weight: 500;
}

.social-links-grid {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
}

.social-icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  background-color: var(--bg-primary);
}

.social-icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 4px 10px rgba(var(--accent-rgb), 0.15);
}

.social-icon-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.home-intro-text {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.intro-badge {
  display: inline-flex;
  align-self: flex-start;
  background-color: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
  padding: 0.6rem 1.6rem;
  border-radius: 20px;
  font-size: 1.2rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.lead-bio {
  font-size: 2.2rem;
  font-weight: 300;
  line-height: 1.6;
  color: var(--text-primary);
}

.cta-actions {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
}

/* --------------------------------------------------------------------------
   7. Panel: About
   -------------------------------------------------------------------------- */
.about-layout-container {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.about-bio-content {
  max-width: 720px;
  margin: 0 auto;
}

.about-bio-card h3 {
  font-size: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.about-bio-card p {
  font-size: 1.6rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.about-bio-card p:last-child {
  margin-bottom: 0;
}

.about-leadership-card h3 {
  font-size: 2rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.scope-items {
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.scope-items.grid-layout-horizontal {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
}

@media screen and (max-width: 900px) {
  .scope-items.grid-layout-horizontal {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (max-width: 600px) {
  .scope-items.grid-layout-horizontal {
    grid-template-columns: 1fr;
  }
}

.scope-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 2.5rem;
  border-radius: 12px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.scope-item:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.scope-icon {
  font-size: 2.4rem;
  line-height: 1;
  background-color: var(--bg-tertiary);
  width: 48px;
  height: 48px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.scope-icon svg {
  width: 2.2rem;
  height: 2.2rem;
  color: var(--accent);
}

.scope-text strong {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.4rem;
}

.scope-text strong a {
  color: inherit;
  transition: color 0.2s ease;
}

.scope-text strong a:hover {
  color: var(--accent);
}

.scope-text p {
  font-size: 1.4rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.skills-radar-card {
  background-color: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: var(--card-shadow);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.skills-radar-layout {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 4rem;
  align-items: start;
}

.skills-list-column h3, .radar-chart-column h3 {
  font-size: 2rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

#radar-chart-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 280px;
}

/* Radar SVG Styles */
.radar-grid-poly {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 1px;
}

.radar-axis-line {
  stroke: var(--border-color);
  stroke-width: 1px;
  transition: stroke 0.3s ease, stroke-width 0.3s ease;
}

.radar-axis-line.highlighted {
  stroke: var(--accent);
  stroke-width: 1.5px;
}

.radar-area-poly {
  fill: rgba(var(--accent-rgb), 0.15);
  stroke: var(--accent);
  stroke-width: 2px;
  transition: fill 0.3s ease, stroke 0.3s ease;
}

.radar-area-poly:hover, .radar-area-poly.highlighted {
  fill: rgba(var(--accent-rgb), 0.3);
  stroke: var(--accent-hover);
}

.radar-vertex-dot {
  fill: var(--bg-secondary);
  stroke: var(--accent);
  stroke-width: 2px;
  cursor: pointer;
  transition: r 0.2s ease, fill 0.2s ease, stroke 0.2s ease;
}

.radar-vertex-dot:hover, .radar-vertex-dot.highlighted {
  r: 6;
  fill: var(--accent);
  stroke: var(--text-primary);
}

.radar-label {
  font-family: 'Outfit', sans-serif;
  font-size: 10px;
  fill: var(--text-secondary);
  text-anchor: middle;
  cursor: pointer;
  transition: fill 0.2s ease, font-weight 0.2s ease;
}

.radar-label:hover, .radar-label.highlighted {
  fill: var(--accent);
  font-weight: 600;
}

/* Interactivity links back to skill tags */
.skill-tag {
  cursor: pointer;
}

.skill-tag.accent-highlight {
  border-color: var(--accent) !important;
  background-color: rgba(var(--accent-rgb), 0.1) !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(var(--accent-rgb), 0.1);
  color: var(--text-primary) !important;
}

.skills-grid-horizontal {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
  align-items: start;
}

.skills-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.skills-column h4 {
  font-size: 1.3rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.skill-tag {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  font-size: 1.3rem;
  padding: 0.6rem 1.4rem;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.skill-tag:hover {
  border-color: var(--accent);
  background-color: rgba(var(--accent-rgb), 0.05);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   8. Panel: Publications
   -------------------------------------------------------------------------- */
.citation-dashboard {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.stat-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: var(--card-shadow);
  transition: all 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-hover);
}

.stat-num {
  font-family: 'Outfit', sans-serif;
  font-size: 3.6rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.stat-label {
  font-size: 1.2rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.publications-top-row {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 3.5rem;
  align-items: stretch;
  margin-bottom: 3.5rem;
}

.bibliography-split-layout {
  display: grid;
  grid-template-columns: 1.2fr 1.8fr;
  gap: 3.5rem;
  align-items: start;
}

.featured-column h3, .archive-column h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  display: flex;
  align-items: center;
}

.chart-card {
  padding: 3rem;
}

.chart-header {
  margin-bottom: 2.5rem;
}

.chart-meta {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.chart-container-inner {
  position: relative;
  height: 250px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.chart-loading {
  font-size: 1.4rem;
  color: var(--text-muted);
}

/* Custom SVG Bar Chart Node Styling */
.chart-bar-rect {
  fill: var(--accent);
  opacity: 0.85;
  transition: opacity 0.2s ease, fill 0.2s ease;
}

.chart-bar-rect:hover {
  opacity: 1;
  fill: var(--accent-secondary);
}

.chart-text-year {
  font-size: 10px;
  fill: var(--text-secondary);
  text-anchor: middle;
}

.chart-text-value {
  font-size: 10px;
  fill: var(--text-primary);
  text-anchor: middle;
  font-weight: 600;
}

.chart-axis-line {
  stroke: var(--border-color);
  stroke-width: 1px;
}

/* Tooltip style */
.chart-tooltip {
  position: absolute;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  font-size: 1.2rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 10;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.bibliography-card {
  padding: 3rem;
}

.bibliography-header {
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.5rem;
}

.bib-meta {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.bib-loading {
  font-size: 1.4rem;
  color: var(--text-muted);
  padding: 4rem 0;
  text-align: center;
}

/* --------------------------------------------------------------------------
   8a. BibBase Custom Theme Overrides
   ========================================================================== */
#bibbase-wrapper {
  margin-top: 1rem;
}

/* Headers / Years in BibBase */
.bibbase_group, div.bibbase_group {
  font-family: 'Outfit', sans-serif !important;
  font-size: 1.8rem !important;
  font-weight: 600 !important;
  color: var(--text-primary) !important;
  border-bottom: 1px solid var(--border-color) !important;
  margin-top: 3.5rem !important;
  margin-bottom: 1.5rem !important;
  padding-bottom: 0.5rem !important;
}

.bibbase_group:first-of-type {
  margin-top: 1rem !important;
}

/* Individual Paper Container */
.bibbase_paper, div.bibbase_paper {
  margin-bottom: 2.2rem !important;
  padding-bottom: 1.8rem !important;
  border-bottom: 1px dashed var(--border-color) !important;
  font-size: 1.45rem !important;
  line-height: 1.6 !important;
  color: var(--text-secondary) !important;
  font-family: inherit !important;
}

.bibbase_paper:last-child {
  border-bottom: none !important;
  margin-bottom: 0 !important;
  padding-bottom: 0 !important;
}

/* Paper Titles */
a.bibbase_paper_title, .bibbase_paper a[href*="bibbase"] {
  font-family: 'Outfit', sans-serif !important;
  font-size: 1.6rem !important;
  font-weight: 500 !important;
  color: var(--text-primary) !important;
  text-decoration: none !important;
  display: inline-block !important;
  margin-bottom: 0.6rem !important;
  line-height: 1.4 !important;
}

a.bibbase_paper_title:hover {
  color: var(--accent) !important;
}

/* Authors Text */
.bibbase_paper .author, .bibbase_paper span.author {
  color: var(--text-secondary) !important;
  font-weight: 400 !important;
}

/* Highlight Vivek Krishnakumar in Authors */
.bibbase_paper .author:contains("Krishnakumar"),
.bibbase_paper span.author:contains("Krishnakumar") {
  font-weight: 600 !important;
  color: var(--text-primary) !important;
}

/* Journal / Booktitle */
.bibbase_paper .journal, .bibbase_paper .booktitle {
  font-style: italic !important;
  color: var(--text-muted) !important;
}

/* BibBase Links Buttons (e.g. abstract, bibtex, pdf) */
.bibbase_paper a.bibbase_link, .bibbase_paper span.bibbase_link a {
  display: inline-block !important;
  background-color: var(--bg-tertiary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-secondary) !important;
  padding: 0.3rem 1rem !important;
  border-radius: 4px !important;
  font-size: 1.2rem !important;
  margin-right: 0.8rem !important;
  margin-top: 0.8rem !important;
  font-weight: 500 !important;
  text-decoration: none !important;
  transition: all 0.2s ease !important;
}

.bibbase_paper a.bibbase_link:hover {
  background-color: var(--bg-primary) !important;
  color: var(--accent) !important;
  border-color: var(--accent) !important;
}

/* BibTeX block override */
pre.bibtex {
  background-color: var(--bg-primary) !important;
  border: 1px solid var(--border-color) !important;
  color: var(--text-secondary) !important;
  font-family: monospace !important;
  padding: 1.5rem !important;
  border-radius: 6px !important;
  font-size: 1.2rem !important;
  margin-top: 1rem !important;
}

/* Custom Scholar Bibliography Styles */
.pub-year-group {
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  background-color: rgba(var(--accent-rgb), 0.02);
  transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.pub-year-group:hover {
  border-color: var(--border-hover);
  background-color: rgba(var(--accent-rgb), 0.04);
}

.pub-year-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 1.5rem 2rem;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.2s ease;
}

.pub-year-header:hover {
  background-color: rgba(255, 255, 255, 0.02);
}

:root[data-theme="light"] .pub-year-header:hover {
  background-color: rgba(0, 0, 0, 0.01);
}

.pub-year-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--text-primary);
}

.pub-year-meta {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.pub-year-count {
  font-size: 1.2rem;
  color: var(--text-muted);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.8rem;
  border-radius: 12px;
  font-weight: 500;
}

.pub-year-chevron {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
}

.pub-year-header:hover .pub-year-chevron {
  color: var(--accent);
}

.pub-year-header[aria-expanded="true"] .pub-year-chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.pub-year-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease;
}

.pub-year-content.expanded {
  opacity: 1;
}

.pub-list {
  list-style: none;
  padding: 0 2rem 2rem 2rem;
}

.pub-item {
  padding-top: 1.8rem;
  padding-bottom: 1.8rem;
  border-bottom: 1px dashed var(--border-color);
  font-size: 1.45rem;
  line-height: 1.6;
  color: var(--text-secondary);
  position: relative;
  transition: all 0.3s ease;
}

.pub-item.high-impact {
  border-left: 3px solid var(--accent-secondary) !important;
  padding-left: 1.5rem;
  background-color: rgba(13, 148, 136, 0.02); /* accent-secondary tint */
}

.pub-impact-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: rgba(13, 148, 136, 0.08); /* accent-secondary tint */
  color: var(--accent-secondary);
  border: 1px solid rgba(13, 148, 136, 0.15);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pub-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 1.2rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pub-copy-btn:hover {
  background-color: var(--bg-primary);
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

.pub-copy-btn svg {
  fill: currentColor;
}

.pub-copy-btn.copied {
  background-color: rgba(13, 148, 136, 0.1) !important;
  color: var(--accent-secondary) !important;
  border-color: var(--accent-secondary) !important;
}

.pub-item:first-of-type {
  padding-top: 0.5rem;
}

.pub-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.pub-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 0.6rem;
  line-height: 1.4;
  transition: color 0.2s ease;
}
.pub-title:hover {
  color: var(--accent);
}
.pub-authors {
  color: var(--text-secondary);
  font-size: 1.4rem;
  margin-bottom: 0.6rem;
}
.pub-authors strong {
  color: var(--text-primary);
  font-weight: 600;
}
.pub-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 1.3rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.pub-venue {
  font-style: italic;
}
.pub-cite-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background-color: rgba(var(--accent-rgb), 0.06);
  border: 1px solid rgba(var(--accent-rgb), 0.12);
  color: var(--accent);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 1.2rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}
.pub-cite-badge:hover {
  background-color: rgba(var(--accent-rgb), 0.12);
  border-color: rgba(var(--accent-rgb), 0.2);
  transform: translateY(-1px);
}
.pub-cite-badge svg {
  fill: currentColor;
}

/* --------------------------------------------------------------------------
   9. Panel: CV / Resume
   -------------------------------------------------------------------------- */
.cv-section {
  margin-top: 4rem;
}

.cv-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 5rem;
  align-items: start;
}

.cv-column {
  width: 100%;
}

.cv-column-heading {
  font-family: 'Outfit', sans-serif;
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
  letter-spacing: -0.01em;
}

.cv-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0;
}

.cv-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  width: 2px;
  height: 100%;
  background-color: var(--timeline-line);
}

.timeline-block {
  position: relative;
  margin-bottom: 4.5rem;
  padding-left: 55px;
}

.timeline-block:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  top: 6px;
  left: 13px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  background-color: var(--bg-primary);
  z-index: 2;
  transition: background-color 0.2s ease;
}

.timeline-block:hover .timeline-marker {
  background-color: var(--accent);
}

.timeline-content {
  background-color: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: var(--card-shadow);
}

.cv-date {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: inline-block;
  margin-top: 0.2rem;
}

.cv-company-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  cursor: pointer;
}

.cv-company-header:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 8px;
}

.cv-company-header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.cv-block-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  cursor: pointer;
  transition: transform 0.3s ease, color 0.3s ease, border-color 0.3s ease, background-color 0.3s ease;
  flex-shrink: 0;
}

.cv-company-header:hover .cv-block-toggle {
  color: var(--accent);
  border-color: var(--accent);
  background-color: rgba(var(--accent-rgb), 0.05);
}

.cv-block-toggle[aria-expanded="true"] {
  transform: rotate(180deg);
  color: var(--accent);
  border-color: var(--accent);
}

.cv-block-details {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

.cv-block-details.expanded {
  opacity: 1;
}

.cv-block-details-inner {
  padding-top: 2rem;
}

.cv-logo-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  flex-shrink: 0;
  padding: 0.8rem;
  color: var(--accent);
  transition: all 0.3s ease;
}

.timeline-block:hover .cv-logo-wrapper {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(var(--accent-rgb), 0.15);
}

.cv-logo-wrapper svg {
  width: 100%;
  height: 100%;
}

.cv-company {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0;
  letter-spacing: -0.02em;
}

.cv-company a {
  color: inherit;
  transition: color 0.2s ease;
}

.cv-company a:hover {
  color: var(--accent);
}

.cv-job {
  border-left: 2px solid var(--border-color);
  padding-left: 2rem;
  margin-bottom: 2.2rem;
}

.cv-job:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.cv-job-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
}

.cv-job-desc {
  font-size: 1.45rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Original Document Google Doc view */
.cv-doc-container {
  max-width: 850px;
  margin: 0 auto;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--bg-secondary);
  box-shadow: var(--card-shadow);
}

.cv-embed-download-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 3rem;
  background-color: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  font-size: 1.4rem;
  font-weight: 500;
  color: var(--text-primary);
}

.iframe-responsive-container {
  position: relative;
  height: 0;
  padding-bottom: 120%; /* Ratio of height to width for doc */
  overflow: hidden;
}

.cv-iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #ffffff; /* Frame background white for doc */
}

/* Helper Class for visibility */
.hidden {
  display: none !important;
}

/* --------------------------------------------------------------------------
   10. Footer Section
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: 8rem;
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  background-color: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 1.3rem;
  color: var(--text-muted);
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-meta {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.footer-action-link {
  font-size: 1.3rem;
  color: var(--text-muted);
  text-decoration: underline;
  transition: color 0.2s ease;
}

.footer-action-link:hover {
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   11. Responsiveness (Mobile-First Overrides)
   -------------------------------------------------------------------------- */
@media screen and (max-width: 900px) {
  .site-main {
    padding-top: 100px;
    padding-bottom: 40px;
  }
  
  .home-container {
    grid-template-columns: 1fr;
    gap: 4rem;
    text-align: center;
    min-height: auto;
  }
  
  .home-intro-text {
    align-items: center;
  }
  
  .intro-badge {
    align-self: center;
  }
  

  .skills-grid-horizontal {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  
  .skills-radar-layout {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .publications-top-row {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }

  .bibliography-split-layout {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  
  .cv-grid {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  
  .citation-dashboard {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media screen and (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: 66px; /* Header height */
    left: 0;
    width: 100%;
    height: 0; /* Hidden state */
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    transition: height 0.3s ease;
  }
  
  .main-nav.mobile-active {
    height: calc(100vh - 66px);
  }
  
  .nav-list {
    flex-direction: column;
    padding: 4rem 0;
    width: 100%;
    gap: 3rem;
  }
  
  .nav-link {
    font-size: 1.8rem;
  }
  
  .nav-link.active::after {
    display: none;
  }
  
  .theme-toggle-container {
    margin-top: 2rem;
  }

  /* Hamburger Animation */
  .menu-toggle.open .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .menu-toggle.open .bar:nth-child(2) {
    opacity: 0;
  }
  .menu-toggle.open .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .cv-controls {
    flex-direction: column;
    gap: 2rem;
    align-items: flex-start;
  }
  
  .cv-controls .toggle-group {
    width: 100%;
  }
  
  .cv-controls .toggle-btn {
    flex: 1;
    text-align: center;
  }
  
  .cv-controls #cv-print-btn {
    width: 100%;
  }

  .footer-container {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }
}

@media screen and (max-width: 480px) {
  .citation-dashboard {
    grid-template-columns: 1fr;
  }
  
  .lead-bio {
    font-size: 1.8rem;
  }
  
  .cta-actions {
    flex-direction: column;
    width: 100%;
    gap: 1.2rem;
  }
  
  .cta-actions .btn {
    width: 100%;
  }
  
  .timeline-block {
    padding-left: 35px;
  }
  
  .cv-timeline::before {
    left: 10px;
  }
  
  .timeline-marker {
    left: 3px;
  }

  .skills-grid-horizontal {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

/* Featured Publications styles */
.featured-grid {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.featured-card {
  background-color: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent);
  border-radius: 12px;
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.featured-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.featured-card .pub-title {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
  display: block;
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.featured-card .pub-title:hover {
  color: var(--accent);
}

.featured-card .pub-authors {
  font-size: 1.3rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.4;
}

.featured-card .pub-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  font-size: 1.2rem;
  margin-top: auto;
}

.featured-card .pub-year-badge {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--accent);
  padding: 0.2rem 0.8rem;
  border-radius: 4px;
  font-weight: 600;
}



/* --------------------------------------------------------------------------
   12. Print Optimization Stylesheet
   ========================================================================== */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
    line-height: 1.5;
  }

  #dna-canvas, 
  .site-header, 
  .site-footer, 
  .cv-controls,
  .no-print,
  #cv-content-doc,
  #home,
  #about,
  #publications {
    display: none !important;
  }

  .site-main {
    padding: 0 !important;
    margin: 0 !important;
    width: 100% !important;
    max-width: 100% !important;
  }

  /* Force display CV interactive timeline and expand details for print */
  #cv {
    display: block !important;
    opacity: 1 !important;
    transform: none !important;
    padding: 0 !important;
  }

  #cv-content-web {
    display: block !important;
    margin-top: 0 !important;
  }

  .panel-header {
    margin-bottom: 2rem !important;
    padding-bottom: 1rem !important;
    border-bottom: 2px solid #000000 !important;
  }

  .panel-heading {
    font-size: 24pt !important;
    color: #000000 !important;
  }

  .panel-subheading {
    font-size: 10pt !important;
    color: #555555 !important;
  }

  .cv-timeline {
    max-width: 100% !important;
    padding: 0 !important;
  }

  .cv-timeline::before {
    display: none !important; /* Hide timeline line in print */
  }

  .timeline-block {
    padding-left: 0 !important;
    margin-bottom: 2.5rem !important;
    page-break-inside: avoid;
  }

  .timeline-marker {
    display: none !important;
  }

  .timeline-content {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    background: transparent !important;
  }

  .cv-date {
    font-size: 10pt !important;
    color: #444444 !important;
    font-weight: bold !important;
    display: block !important;
    margin-bottom: 0.2rem !important;
  }

  .cv-company {
    font-size: 16pt !important;
    color: #000000 !important;
    margin-bottom: 0.8rem !important;
    border-bottom: 1px solid #ddd !important;
    padding-bottom: 0.2rem !important;
  }

  .cv-job {
    border-left: none !important;
    padding-left: 0 !important;
    margin-bottom: 1.5rem !important;
  }

  .cv-job-title {
    font-size: 11pt !important;
    color: #111111 !important;
    font-weight: bold !important;
  }

  .cv-job-desc {
    font-size: 10pt !important;
    color: #333333 !important;
  }

  /* Expand CV accordion panels for print */
  .cv-block-details {
    max-height: none !important;
    opacity: 1 !important;
    overflow: visible !important;
    transition: none !important;
  }
  .cv-block-toggle {
    display: none !important;
  }
  .cv-company-header {
    cursor: default !important;
  }
}